Scroll cutting machine



Dec 4, 1934- F. czl-:MBA

SCROLL CUTTING MACHINE 5 Sheets-Sheet 1 Filed OCT.. 17, 1932 munun m1 1,;

mlllllll Dec. 4, 1934. F. czEMBA SCROLL CUTTING MACHINE 3 Sheets-Sheet 2 Filed Oct. 17, 1932 ffwml 2e/7.25@ z Decz. 4, 1934. l F, czEMBA '1,982,983

SCROLL CUTTING MACHINE Filed oct. 17, 1952 s sheets-sheet s Patentedl Dec. 4, 1934 SCROLL CUTTING MACHINE Y Frank Czemba, ican Steel &

Duluth, Minn., assignor to Amer- Wire Company,

Chicago, Ill., a

corporation of New Jersey Application October 17,

11 Claims.

The invention relates to apparatus for cutting a serpentine groove, having reference more particularly to l,apparatus for grooving the conical surface of a roll of a mill such as is used for rolling fence posts.

An object of the invention is to provide mechanism which will cut a serpentine or sinuous groove in cylindrical as well as conical surfaces and which can be adjusted to vary the depth of the groove or the pitch of the convolutions within limits. l

The present device has been designed to cut a groove on the roll of a mill so that the fence post rolled thereby will be provided with a decorative scroll and as the size of the rolls varies the apparatus embodies novel means permitting adjustment to suit the conical surfaces of different tavDers. and different diameters.

With these and various other objects in view.

the invention may consist of, certain novel features of construction and operatiomas will be more fully described and particularly pointed out in the specification, drawings and claims appended hereto.

In the drawings which illustrate an embodiment ofthe device and whereinlike reference characters are used to designate like partswith a roll for cutting a groove thereon;`

' Figure 2 is a side elevational view of the groove cuttingV apparatus shown in Figure 1;

Figure 3 is an end view of the' device looking toward theleft of Figure 2;

showing reciprocate the tool carrier; and r Figure 5j is a vertical sectional view taken along the line 5 5 of Figure 4.

The apparatus of the invention has been designed especially for grooving the conical face of a roll 10 used in mills for rolling fence posts, the grooves being of wavy or serpentine form so l that the fabricated post will be provided with a decorative scroll.V The base 11 of the apparatus is provided with a pair of parallel guideways 12 extending longitudinally of the base and also a plurality of stepped surfaces 13 and 14 positioned on opposite sides of the longitudinal axis respectively. The guideways receive a supporting plate 15.101- the tool carrier and a second supporting plate 16 for journalling an eccentric to be later described.

The upper surface. of the plate 15, as more parthe conical surface of Figure 1 is a top plan view of the device ofthe present invention showing the same associated Figure 4 is a fragmentary sectional view taken substantially on the line 4-4 of Figure 3 and the means for driving the eccentric to 1932, Serial N0. 638,251 (Cl. 873-11) ticularly shown in Figure 5, is provided with a circular groove 17 concentric with the centering pin 18, which passes through a central opening in plate 15 and swivel plate 2U associated therewith. An annular projection 21, depending from the base of platev 20, is received within groove 17 on the supporting plate and thus the members permitof a plurality of movements as the supporting plate rides within the grooves 12 on the base, while the swivel plate carried thereby has alternative movements with respect to the base. The securing bolt 22 extends through an arcuate slot 23 in the supporting plate in alignment with groove 17 and has threaded engagement in plate 20 so that the members can be locked in adjusted 70 rotated position.

The cutting tool 24 has movement longitudinally of the base in addition to movement transversely thereof and is mounted in tool posts 25 integral with the tool carrier 26 having guide- 75 ways 27 formed on its bottom surface for tting in guideways provided by the swivel plate 20.

It is to` be noted that the guideways 27 extend at an angle to the transverse axis of the tool carrier which in the present structure is approximately eight degrees, conforming tothe taper of the roll. Accordingly, tool 24 will travel parallel with the conical surface to` be grooved when the edges of thev tool carrier and swivel plate 20 are in alignment with 85 the edges Vof the base. In order to vary the angularity of tool 24 with respect to the longitudinal axis of the base the swivel plate 20 is rotated on supporting plate 15 which will necessitate minor alterations in the existing structure, as will be better understood as the description proceeds.

The position oi the cutting tool 24 in its supporting posts is varied by the adjusting screw 28 threaded in block 30, while the tool after once being properly adjusted is securely held in position by the locking screws 31.

suitably secured to the tool carrier 26 is a guide member 32, the outer endfof which rests on plate 33 having undercut guideways on its lower 100 surface for tting with guideways 12 in the base. The guide member also forms an angle with the longitudinal axis of the base member, in the present case approximating eight degrees,v whereby the guiding of thev member 4by means of the 105 guide. block 34 -adjustably secured to plate 33 by means of screws 35 passing through the arcuate slot 36 in Vthe plate directs the reciprocating movement of the tool carrier on the guideways of g plate 20. Proper positioning of the guide block 1,10

CTI

' 4be increased or decreased.

.in the scroll.r It is very at its ends in bearings 34 will steady the reciprocating movement of the tool carrier by providing a defined and definite path for the carrier so that the travel of the cutting tool 24 will throughout its limits of movement follow the selected angle of eight degrees with the longitudinal axis of the base.

In order that theabove may result it is necessary that plate 33'be maintained at a denite distance from the tool carrier and accordingly ther invention provides a connecting plate 37 having securement at one end by means of bolts 38 to the plate 33 and at its other end to the swivel plate 20. As shown in Figure 2 the connecting member is disposed along one side of the base and in order that the position of the tool carrier may be altered to accommodate the Various passes in the roll the member is provided with a longitudinal slot 40 for receiving the securing bolts 41 for securing the member to the base. By the above structure the swivel plate 2D and parts associated therewith in combination with the guide plate 33 can be moved bodily longitudinally of the base, while the particular spacing between the tool carrier and guide plate is maintained constant.

Reciprocation of the tool carrier on guideways 27 is accomplished by means of a connecting rod 42, Figure 4, provided with openings at its re spective ends, one of which is fitted with bushings 43 for engaging the circular boss 44 formed integrally with the carrier plate, while the other opening is fitted to the boss or eccentric respectively serve to main# tain the connecting rod in operative position.

gearing 5'? which is operatively connected through a chain of gears to the spindle stock of theroll lathe.

Through rotary movements imparted to shaft 4` 48 fromA the driving shaft 54 the connecting rod 42 is actuated to reciprocate the tool carrier, movement of which takes place on guideways 27 parallel with the conical face of the portion of the roll to be grooved. Byproper choice of the driving gears for shaft 54 the pitch of the convolutions of the groove can be made shorter or longer and; by a change in the throw of the eccentric 46 the height of the scroll ordinate can It has been found from practical experience that when two ends of the connecting link 42 are too far displaced from a longitudinalline running through the center of one of them irregularities or jogs are produced desirable that the center of the bevel gear 50 at the left hand end of the link shall not be greatly displaced laterally'from the longitudinal axis through the center of 'the boss 44 on the carrier plate and in order to keep `the displacement .to a minimum additional threaded openings are provided in the base for receiving securing screws for the bearings 55, permitting shifting of the drive shaft 54 transversely of the base. The shaft Slis journalled with bushing 45 and engages with the eccentric 46. Cap members 47V threadedA 62 and has threaded en-V,

gagement with block 63 suitably secured to plate 16. Rotation of this shaft serves to adjust the position of plate 16 on the base which may then be locked in desired location by means of the securing bolt 64. The bearings 62 for the threaded shaft are removable as is also block 63 and thus the shaft can be removed when it is necessary Ytochange the position of drive shaft 54.

In order to move the tool from the iirst pass to the second pass of the roll 10 it is rst removed from the posts so as to provide clearance and then the plates 16, 20,:and 33 are loosened from the base and moved to the right, Figure 1, by means of f the threaded screw 61. With this adjustment the tool is again placed in the posts and the plates secured to the base. When it is necessary for the machine to accommodate diiferent tapers than that for which the gudeways 27 and guide 32 have been designed it becomes necessary to remove the connector 3'7 and rotate thel swivel plate 20 on its supporting plate. Locking of the` plates is then eiected by screw 22. Y

It is to be understood that I do not wish to be limited by the exact embodiment of the device shown, which is merely by way of illustration' supporting plate fitting in the guideways and se- 1 cured in position on the base, a tool carrier supported'on said plate and having movement on the plate at an angle to the longitudinal axis of the base, an eccentric journalled by said base, a connecting rod between the eccentric and tool carrier, and means for rotating said eccentric whereby said carrier is reciprocated on the base.

2. In a device of the character described, comprising a base having longitudinal guideways, a supporting plate tting in the guideways andsecured in position on the base, a swivel plate rotatable on the supporting plate and provided with means for securing. the plates in desired relation, a tool carrier mounted in guideways on the swivel plate, means for, reciprocating saidtool carrier,r and a guidinglmember projecting `therefrom and being guided by said base.

3. In a device of the character described, com- V prismg a base having longitudinal guideways, 'a

supporting plate fitting in the guideways and se cured in position on the base, a swivel plate rotatable on the supporting plate and provided with means for securing'the plates in desired relation, a tool carrier mounted in guideways on the swivel plate, an eccentric journalled by said base, a connecting rod between the eccentric andtool carrier, and means for rotating said eccentric whereby said carrier is reciprocated.

4. In a device of the character prising a base having longitudinal guideways, a supporting plate fitting in the guideways and secured in position on the base, a swivel plate rotatn described, come;

able on the supporting plate and provided with means for securing the plates rin desired rela.

tion, a tool carrier mounted in guideways on the swivel plate, a secondsupporting plate journalling a drive shaft and mounted in the guideways' on the base, means securing said second supporting plate to the base,

eccentric and tool carrier, and means including an eccentric journalled in said' second plate, a connecting rod between the? said drive shaft for rotating the eccentric whereby the carrier is reciprocated.

5. In a device of the character described comprising a base having longitudinal guideways, spaced supporting plates fitting in saidguideways, a tool carrier supported by one of said plates and having rotative and reciprocating movement with respect thereto, and an eccentric journalled by said other plate, said eccentric having operative connection with said tool carrier to cause reciprocation thereof.

6. In a device of the character described comprising a base having longitudinal guideways spaced supporting plates fitting in said guideways, a tool carrier supported by one of said plates and having rotative and reciprocating movement with respect thereto, means mounted for rotation in said other plateand providing an eccentric, and a connecting rod connecting said eccentric with the tool carrier for causing reciprocation thereof.

7. In a device of the character described comprising a base having longitudinal guideways, spaced supporting plates fitting in said guideways, a tool carrier supported by one of said plates and having rotative and reciprocating movement with respect thereto, means rotatably mounted in said second plate and providing an eccentric, a driving shaft journalled by the base and by said other plate and operatively connecting With the rotatable means, and a connecting rod between the eccentric and the tool carrier for causing reciprocation thereof.

8. In a device of the character described, comprising a base having longitudinal guideways, a supporting plate fitting in the guideways and secured in position on the base, a swivel plate rotatable on the supporting plate and having means for securing said plates in desired relation, a tool carrier mounted in guideways on said swivel plate whereby said tool carrier has rotative and reciprocating movements with respect to the base, and a hub provided on said tool carrier and operatively connecting with means for reciprocating the carrier.

9. In a device of the character described, comprising a base having longitudinal guideways, a supporting plate fitting in the guideways and secured in position on the base, a swivel plate rotatable on the supporting plate and having means for securing said plates in desired relation, a tool carrier mounted in guideways on said swivel plate whereby said tool carrier has rotative and reciprocating movement with respect to the base, means for reciprocating said tool carrier, means for guiding the tool carrier during reciprocation thereof, and means adjustably fixed to the base for association with said guiding means.

10. In a device of the character described, comprising a base having longitudinal guideways, a supporting plate fitting in the guideways and secured in position on the base, a swivel plate rotatable on the supporting plate and having means for securing said plates in desired relation, a tool carrier mounted in guideways on said swivel plate whereby said tool carrier has rotative and reciprocating movements with respect to the base, a hub provided on said tool carrier, a second supporting plate fitting in the guideways on the base and secured in spaced relation with the tool carrier, means mounted for rotation in said second plate and providing an eccentric, and a connecting rod connecting the eccentric with the hub for reciprocating the tool carrier,

11. In a device of the character described, comprising a base having longitudinal guideways, a supporting plate iitting in the guideways, and secured in position on the base, a swivel plate rotatable on the supporting plate and having means for securing said plates in desired relation, a tool carrier mounted in guideways on said swivel plate whereby said tool carrier has rotative and reciprocating movements with respect to the base, a hub provided on said tool carrier, a second supporting plate tting in the guideways on the base and secured in spaced relation with the tool carrier, means mounted for rotation in said second plate and providing an eccentric, a driving shaft journalled by the base and by said second plate and operatively connecting with said rotatable means, and a connecting rod between the eccentric and the tool carrier for causing reciprocation thereof.

v FRANK CZEMBA. 

